(1) See USB drive.|
(2) A magnetic disk drive that plugs into a USB or FireWire port on a computer. Used for backup, secondary storage as well as transport, portable hard drives rival, and may often exceed, the capacity of internal hard drives.
Portable Vs. Desktop Drives
External drives for stationary desktop use are larger than the portable USB drives used for transport. In addition, desktop drives typically require power from the wall, whereas portable hard drives can be powered from the USB connection. See USB drive kit.
Plugging into the computer's USB port and deriving all power from the USB, Iomega's 7-ounce eGo drives provide up to 500GB for backup, auxiliary storage and transport. (Image courtesy of Iomega Corporation.)
With capacities up to 500GB, this LaCie portable drive's rubber sleeve and internal rubber bumpers absorb the shock if dropped up to six feet. It also plugs into both USB and FireWire. (Image courtesy of LaCie USA, www.lacie.com)
With up to 2TB of storage, this LaCie desktop drive plugs into the USB port. Although they can be easily unplugged and moved, at 2.5 pounds, drives such as these are designed for stationary use. (Image courtesy of LaCie USA, www.lacie.com)
This was breakthrough technology when introduced by IBM in 1956. It held a whopping 5MB and weighed a ton (see